what is the type of screw length and screw diameter that can fit?

It's compatible with all major collated screw brands up to 2" long.

Will this work on a corded Milwaukee screw gun?

Collated unit fits the 2866-20 battery powered screw gun

Does this attachment hold square bits? All I can find at home depot is 5.8” Phillips bits.

It doesn't come with it. But I would take the bits that come with the attachment to home depot and see if there is square bits with the correct length. That the main question. The correct lenght.

Can this be used with an impact or do i need the drywall drill

It can only be used with the drywall drill from milwaukee.and it works really well.

Electric - COLLATED Magazine

Product ID: 65587151

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Details

Brand
Milwaukee
Material
Alloy Steel
Power Source
Battery
Product Dimensions
9.25"L x x
Voltage
18 Volts (DC)

📏Flush screw depth control for flawless finishes

🔧Tapered nose for tight corner access

⚙️Precision screw length adjustment up to 2"

Description

🔩 Upgrade your drywall game with precision and power!

FLUSH DEPTH ADJUSTMENT - Set screw depth flush to the magazine top, minimizing accidental triggers and ensuring consistent results every time.
COMPACT TAPERED NOSE DESIGN - Navigate tight corners and confined spaces with ease—get closer access where others can’t reach.
SEAMLESS M 18 FUEL INTEGRATION - Specifically engineered for the M18 FUEL Drywall Screw Gun (2866) to maximize your tool’s potential.
TAILORED SCREW LENGTH CONTROL - Effortlessly adjust screw length to fit any project with up to 2" compatibility—precision meets versatility.
CERTIFIED LIKE NEW PERFORMANCE - Refurbished, tested, and certified to deliver Milwaukee’s trusted reliability without compromise.

The Milwaukee 49-20-0001 Collated Magazine is a certified refurbished attachment designed for the M18 FUEL Drywall Screw Gun. It features adjustable screw length up to 2", flush screw depth control to prevent accidental actuation, and a tapered nose for better access in tight corners, all packed in a compact, durable design.

Specifications

Manufacturer	Milwaukee Electric
Brand	Milwaukee
Model	49-20-0001
Item Weight	1.34 pounds
Product Dimensions	9.25 x 2.64 x 4.52 inches
Item model number	49-20-0001
Is Discontinued By Manufacturer	No
Manufacturer Part Number	49-20-0001
Voltage	18 Volts (DC)

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